In North China we used the method of over-coring to determine the absolute value of the ground stress.
在华北地区采用应力解除方法进行了地应力绝对值的测量。
Over coring method by using hollow inclusion strain cells is applied for in-situ stress measurement.
采用空心包体套孔应力解除方法，进行现场地应力测量。
Over coring method by using hollow inclusion strain cells is applied for in-situ stress measurement.
采用空心包体套孔应力解除方法，进行现场地应力测量。
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